JP2000171803A - Rubbing device and liquid crystal display device subjected to alignment treatment by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystal display device having a high display grade by uniformly subjecting an alignment layer formed on a glass substrate with transparent electrodes to alignment treatment. SOLUTION: The rubbing device 1 is constituted by sticking a plurality of belt-like rubbing cloth 3 having an arbitrary width to the peripheral surface of a revolving roller 2 so as to come into contact with each other approximately parallel to the axial direction of the revolving roller 2. The rubbing device 1 connected to in such a manner is formed with plural joints 4 approximately parallel to the axial direction of the revolving roller 2 and, therefore, the joints 4 of the narrow spacings rub the alignment layer, by which the alignment treatment over the entire part of the alignment layer is uniformly executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubbing device for aligning an alignment film on a glass substrate with a transparent electrode for a liquid crystal display device, and a liquid crystal display device using the rubbing device.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional rubbing apparatus 11, in which 12 is a rotating roller, 13 is a rubbing cloth wound and adhered to the peripheral surface of the rotating roller 12, and 14 is a rectangular rubbing cloth wound. It is a seam made by butting both ends.

[0003] One rectangular rubbing cloth 13 is wound around the peripheral surface of the rotating roller 12 and is adhered with a double-sided tape. Then, by using the rubbing device 11 configured as described above, the alignment film formed on the glass substrate with the transparent electrode is rubbed with the rubbing cloth 13 while rotating the rotating roller 12 to perform an alignment process.

[0004]

However, in the conventional rubbing device 11 as described above, there is one seam 14 formed by joining both ends of a rectangular rubbing cloth 13 wound and adhered to a rotating roller 12. Therefore, when the alignment film is rubbed, there has been a problem that the alignment treatment at the joint portion is not uniform with other portions.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and a rubbing apparatus for improving non-uniform alignment processing at a seam of a rubbing cloth and a liquid crystal display having a good display quality obtained by performing alignment processing using the rubbing apparatus. It is intended to provide a device.

[0006]

In order to achieve the above object, the present invention provides a rubbing apparatus comprising: (1) a plurality of belt-shaped rubbing cloths having an arbitrary width on a peripheral surface of a rotating roller; Are attached so as to be in contact with each other at a certain angle parallel to the axial direction.

[0007] (2) A belt-shaped rubbing cloth having an arbitrary width is spirally wound around and attached to the peripheral surface of the rotating roller without gaps.

According to the above configuration (1), a plurality of seams of the rubbing cloth can be formed on the peripheral surface of the rotating roller in parallel or at an angle to the axial direction of the rotating roller.
According to the configuration of (2), one seam is formed in a spiral shape, and a plurality of portions can be formed intermittently when viewed in the axial direction of the rotating roller. A liquid crystal display device with good display quality can be realized.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 shows a rubbing device 1 according to Embodiment 1 of the present invention, wherein 2 is a rotating roller, and 3 is a plurality of rubbings adhered to the peripheral surface of the rotating roller 2. Cloth 4 is a seam formed by abutting each end of the attached rubbing cloth 3.

A plurality of (for example, 26) rubbing cloths 3
Each has a band shape having an arbitrary width (for example, width 1
It is adhered by a double-sided tape so as to be in contact with each other substantially in parallel with the axial direction of a rotary roller 2 (for example, a columnar shape having a diameter of 150 mm and a length of 1000 mm). A seam 4 is formed where each end of the adjacent rubbing cloth 3 is abutted.

Using the rubbing apparatus 1 having the above-described structure, an alignment film formed on a glass substrate with a transparent electrode is subjected to an alignment treatment by rubbing with a rubbing cloth 3 while rotating a rotating roller 2. A liquid crystal is filled between a pair of glass substrates provided with transparent electrodes which are subjected to the alignment treatment and are opposed to each other, to constitute a liquid crystal display device.

As described above, in the rubbing device 1 according to the first embodiment, a large number (26) of the seams 4 are formed substantially in parallel to the axial direction of the rotating roller 2, and the seams at a narrow interval are formed. 4 rubs the alignment film, whereby the alignment processing of the entire alignment film is performed uniformly. Therefore, a liquid crystal display device having a liquid crystal display panel with high display quality can be obtained.

In the first embodiment, a plurality of rubbing cloths 3 are stuck substantially parallel to the axial direction of the rotating roller 2, but are stuck at a certain angle to the axial direction of the rotating roller 2. Is also good.

(Embodiment 2) FIG. 2 shows a rubbing device 5 according to Embodiment 2 of the present invention. Here, a band-shaped rubbing cloth 6 having an arbitrary width is spirally wound around the peripheral surface of the rotating roller 2 without any gap, and attached. Reference numeral 7 denotes a seam formed by contact between the end of the rubbing cloth 6 and the end of the rubbing cloth 6 that has made one round.

The rubbing cloth 6 is, for example, in the form of a strip having a width of 5 mm and a length of 55000 mm, and is helically wound around a cylindrical rotary roller 2 having a diameter of 150 mm and a length of 1000 mm at an angle of 3 ° using a double-sided tape. Stick it.

In the rubbing device 5 according to the second embodiment configured as described above, the seam 7 is formed in a spiral shape by the ends of the spirally wound rubbing cloths 6 being in contact with each other. When viewed in the axial direction, many seams 7 will be intermittently arranged. Therefore, by using the rubbing device 5 to perform an alignment treatment on the alignment film on the glass substrate with a transparent electrode, the alignment treatment by the joint of the rubbing cloth becomes uniform as a whole, and a liquid crystal display device with good display quality is realized. be able to.

[0018]

As described above, according to the present invention,
The rubbing cloth attached to the peripheral surface of the rotating roller is provided with a plurality of seams parallel to the axial direction or at an angle, or the orientation on the glass substrate with a transparent electrode using a rubbing device provided with a spiral seam. By performing the orientation treatment on the film, the orientation treatment at the seam of the rubbing cloth can be made uniform as a whole, and as a result, a liquid crystal display device with good display quality can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rubbing device according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view of a rubbing device according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a conventional rubbing device.

[Explanation of symbols]

 1,5 rubbing device 2 rotating roller 3,6 rubbing cloth 4,7 seam

Claims (3)

[Claims] 1. A liquid crystal display device comprising a liquid crystal filled between a pair of glass substrates provided with a transparent electrode which are arranged opposite to each other.
A rubbing device that performs an alignment treatment by rubbing an alignment film formed on the transparent electrode-coated glass substrate, on a peripheral surface of a rotating roller, a band-shaped rubbing cloth having a plurality of arbitrary widths,
A rubbing device characterized in that the rubbing device is adhered so as to be in contact with each other at an angle parallel or at an angle to the axial direction of the rotating roller. 2. A liquid crystal display device in which a liquid crystal is filled between a pair of glass substrates with a transparent electrode disposed opposite to each other.
A rubbing device for rubbing an alignment film formed on a glass substrate with a transparent electrode and performing an alignment treatment, wherein a band-shaped rubbing cloth having an arbitrary width is spirally wound around a peripheral surface of a rotating roller without gap. A rubbing device characterized by being worn. 3. A liquid crystal display device obtained by subjecting an alignment film formed on a glass substrate with a transparent electrode to an alignment treatment using the rubbing device according to claim 1.